CN201688428U - Boiler pulverized coal conveyer system - Google Patents

Boiler pulverized coal conveyer system Download PDF

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Publication number
CN201688428U
CN201688428U CN2010201759420U CN201020175942U CN201688428U CN 201688428 U CN201688428 U CN 201688428U CN 2010201759420 U CN2010201759420 U CN 2010201759420U CN 201020175942 U CN201020175942 U CN 201020175942U CN 201688428 U CN201688428 U CN 201688428U
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China
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coal
pipe
valve
angle
pulverized coal
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Expired - Fee Related
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CN2010201759420U
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Chinese (zh)
Inventor
石福军
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Jingyuan No.2 Electricity Generating Co., Ltd.
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石福军
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Publication of CN201688428U publication Critical patent/CN201688428U/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The utility model discloses a boiler pulverized coal conveyer system, which comprises pulverized coal outlet pipes of a coal mill, a pulverized coal outlet valve, an overhaul plugging board socket, a coal mill by-pass pipe, a by-pass valve, a by-pass main pipe, a by-pass connecting pipe, an angle pulverized coal main pipe, an adjustable shrinkage hole, a layer pulverized coal pipe, a coal angle valve, an air valve, a mixing distributor and a contact tube and the like, wherein the pulverized coal outlet pipes are collected in the mixing distributor, the angle pulverized coal main pipe which is lead out from the mixing distributor is connected with the layer pulverized coal pipe, the layer pulverized coal pipe is provided with the coal angle valve, and the rear portion of the coal angle valve is designed with the air valve. The top portion of the mixing distributor is further connected with a contact pipe of an adjacent boiler, the front portion of the overhaul plugging board socket is connected with the coal mill by-pass pipe, and the two ends of the by-pass main pipe are respectively connected with A layer pulverized coal pipes on the rear portion of the coal angle valve. The boiler pulverized coal conveyer system solves the problems in the prior art that a positive pressure direct-blowing type boiler pulverized coal conveyer system has large abrasion, is easy to cumulate pulverized coal, is easy to block, leaks in cold air, is difficult to level, exists overhaul hidden trouble, has poor burning adjusting flexibility of boilers, poor stability and large delay.

Description

The direct-firing boiler coal-ash induction system of malleation
1. affiliated technical field
The utility model relates to the direct-firing boiler coal-ash induction system of current coal-fired power plant malleation.
2. background technology
The direct-firing boiler coal-ash induction system of the coal-fired power plant's malleation basic structure of prior art is: all burner coal dust spout is according to different coal pulverizers or feeder and layered arrangement, coal pulverizer adopts and has more tube cell, and every flour extraction pipe is connected with a coal dust spout of boiler-burner by intermediate conduit.The mixed wind of the coal dust that coal pulverizer grinds out carries, and enters the boiler furnace burning through coal pulverizer flour extraction pipe, middle power transportation pipe, burner coal dust spout.
There are the following problems for prior art:
1) burner coal dust spout is corresponding one by one with the coal pulverizer flour extraction pipe, and the switching of burner coal dust spout and the switching of coal pulverizer must be carried out synchronously; Different coal pulverizer combined running modes is bigger to the influence of the combustion position of boiler, in the coal pulverizer handoff procedure fluctuation of boiler principal parameter bigger, accident rate is higher; The start and stop of coal pulverizer are had relatively high expectations to operations staff's operant level.
2) condition of coal pulverizer startup is relatively harsher, and incendiary source must be arranged; Particularly when the coal pulverizer that prepare to start does not possess adjacent layer burner coal dust and lights condition, need to throw combustion-supporting oil and light.
3) because burner coal dust spout is corresponding one by one with the coal pulverizer flour extraction pipe, the running status of any flour extraction pipe all has influence on the stability of boiler angle layer flame; Coal pulverizer is bigger owing to losing the probability that coal flame trips, and the tripping operation of coal pulverizer directly influences the stable of unit tape splicing load and boiler combustion.
4) since in the raw coal moisture and other impurity exceed standard, cause the sticking coal of raw coal bulkhead serious, the disconnected coal of coal pulverizer is more common, this influences unit tape splicing load on the one hand, on the other hand the stable of boiler combustion constituted a serious threat, for security consideration, people must not take to throw combustion-supporting wet goods measure then.
5) system is swept in a cold wind of double-inlet and double-outlet steel ball coal mill flour extraction pipe design, opens, stops at coal pulverizer all to require in the program flour extraction pipe is purged; In addition, some blow down valve is not closed completely, and forms to leak out for a long time.Its result: one reduces the coal dust temperature that enters burner hearth, has postponed the time of coal powder ignition; The 2nd, cold wind bleeds behind the burner hearth, has reduced fire box temperature, influences the stability of boiler combustion, can cause the primary air flow through air preheater to reduce relatively simultaneously, thereby exhaust gas temperature raises, and boiler efficiency reduces.
6) accumulated powder, obstruction easily take place in power transportation pipe.Especially double-inlet and double-outlet steel ball coal mill system, frequent generation plugging in service has a strong impact on the normal combustion and the unit tape splicing load-bearing capacity of boiler; Even double-inlet and double-outlet steel ball coal mill has carried out the flour extraction pipe purging when stopping transport, but because the coal pulverizer outlet valve is not closed completely or artificially unlatching, a wind that bleeds still can be blown into flour extraction pipe to a large amount of coal dusts that accumulate in the coal pulverizer, owing to reasons such as wind speed are lower, long coal pipe often stops up, dieseling, even the generation tube cell is blown, unit is forced to the stoppage in transit accident.
7) the coal pulverizer flour extraction pipe is many, and measuring wind speed, coal dust sampling workload is bigger, and the parameter simultaneity that records is relatively poor, a wind leveling difficulty; Same coal pulverizer (or separator) outlet, the fineness of pulverized coal deviation that different flour extraction pipes records is bigger, and it is relatively poor that promptly each layer, each angle enter the uniformity of burner hearth coal dust.
8) boiler combustion stability is relatively poor, and unknown cause causes boiler that critical flame fire-putting-out emergency takes place happening occasionally.
9) air door, the baffle plate of getting in touch with coal pulverizer is more, and Chang Yin is not closed completely, and system is difficult to isolate; During the coal pulverizer maintenance, after opening part coal pulverizer outlet valve, opening the manhole in the coal pulverizer system, under the effect of combustion chamber draft, the suction of outside air is more favourable to service work, yet exist serious hidden danger: when promptly burner hearth emits malleation, can threaten service work personnel's personal safety, accidents such as the personnel that cause suffocate, scald.
10) the coal pulverizer flour extraction pipe is many, and the galling amount is bigger, and flour extraction pipe and middle power transportation pipe are shorter service life.
11) can accumulate a certain amount of coal dust in the stoppage in transit boiler milling system, the purging that need spend certain hour could satisfy personnel and enter the requirement that burner hearth carries out the relevant parameter surveying work, this need consume more station service on the one hand, and coal dust is blown away in vain on the other hand; Can accumulate a large amount of coal dusts in the particularly urgent boiler milling system of stopping using, not purge then spontaneous combustion, blast might take place, purge then that coal dust all enters the row of boiler exhaust gas system to atmosphere, cause waste of fuel and environment black dust pollution.
3. utility model content
3.1 purpose
The technical problems to be solved in the utility model provides a kind of low wearing and tearing, no obstruction, diverse in function, safety anti-explosive, controls easy, as the to strengthen boiler combustion stability direct-firing boiler coal-ash induction system of malleation.Its purpose is to improve the uniformity of each layer of boiler, angle burner coal dust, satisfy flame in the burner hearth evenly, be full of, the burning adjustment basic demand of no deflection; Chop the direct correlation of boiler-burner and coal pulverizer, feeder off, change the present situation that present coal-fired power plant powder process combustion system is pulled one hair and move the whole body, get rid of of the influence of coal pulverizer operation compound mode to boiler combustion, intervene boiler combustion and change into, can realize that burning adjusts that operational ton minimizes, response speed the fastizationest by the coal angle valve; Problems such as furnace flame tomography that solution causes because of feeder or coal pulverizer fault even fire extinguishing; Also will eliminate coal pulverizer maintenance hidden danger, reduce waste of fuel, realize that adjacent stove supplies powder startup etc.
3.2 technical scheme
With the direct-firing boiler coal-ash induction system of the malleation that is equipped with 5 bowl pulverizers is example, and the utility model solves the technical scheme that its technical problem adopts and is:
The direct-firing boiler coal-ash induction system of a kind of malleation comprises the female pipe of coal pulverizer, flour extraction pipe, maintenance closure plate socket, powder output valve, coal pulverizer shunt valve, bypass valve, bypass, bypass tube connector, the female pipe of angle coal dust, adjustable shrinkage cavity, layer coal pipe, coal angle valve, to empty valve, mixing distributor.It is characterized in that every coal pulverizer has only a flour extraction pipe, comes together in mixing distributor; Coal dust female pipe in angle is drawn from mixing distributor, is symmetrically arranged in the boiler both sides; Coal dust female pipe in angle is gone up design adjustable shrinkage cavity, is connected to a layer coal pipe after the adjustable shrinkage cavity, and female pipe design has the coal angle valve near the angle coal dust on the layer coal pipe, behind the coal angle valve except the A layer coal pipe all design have empty valve.
Powder output valve on the flour extraction pipe, maintenance closure plate socket should be tried one's best and be arranged successively near mixing distributor, are connected to the coal pulverizer shunt valve that is connected with the female pipe of bypass before the maintenance closure plate socket, and the coal pulverizer shunt valve is provided with bypass valve; The female pipe of bypass two ends are connected behind 4 coal angle valves with A layer coal pipe respectively, on two short therein bypass tube connectors adjustable shrinkage cavity are housed; The utility model is arranged in igniter in the coal dust spout of B layer coal pipe correspondence.
The mixing distributor top is connected to the liaison tube with adjacent stove, and liaison tube is provided with communicating door near the mixing distributor end, is provided with behind the communicating door empty valve and the powder pumping pipe that is connected with the female pipe of bypass, and powder pumping pipe is provided with takes out the powder valve; The other end of liaison tube is connected with the mixing distributor top of adjacent stove, corresponding communicating door is also arranged, to empty valve, powder pumping pipe with take out the powder valve in adjacent furnace side.
Further, the end of the female pipe of angle coal dust has strengthened caliber, and B, D, E layer coal pipe are all drawn from the end of the female pipe of angle coal dust; The end of the female pipe of angle coal dust has also designed empty valve.
3.3 the beneficial effects of the utility model:
1) coal dust of the present utility model is carried in the main system, and the caliber of flour extraction pipe, mixing distributor, the female pipe of angle coal dust all compares slightly, and the anti-wear material of wall stickup within it, thereby transporting resistance easily, galling all can reduce greatly; Though the caliber of layer coal pipe is the same with prior art, its duct length shortens greatly, and drag losses also can reduce thereupon greatly.Therefore, native system has and reduces metal consumption and function is stopped up in stronger preventing.
Mixing distributor mixes after the coal dust of each coal pulverizer is concentrated fully, by distributing step by step, can improve the uniformity that enters the burner hearth coal dust greatly again, helps alleviating the boiler coke situation; On the system-based of a complete symmetric design, layout, the adjustable shrinkage cavity on the female pipe of diagonal angle coal dust is adjusted, thereby a wind leveling workload significantly reduces, and the leveling quality can significantly improve.
Coal pulverizer flour extraction pipe quantity significantly reduces, coal dust sampling workload thereby significantly reduce, and the parameter that records has more representativeness.
Need not design the purging system of power transportation pipe, can reduce boiler and leak out, improve the security and the economy of boiler combustion.Can utilize combustion chamber draft to aspirate the coal dust that inactive pipeline section accumulates what some possibility accumulated powder position was designed to do-nothing system, prevent spontaneous combustion, blast.
2) boiler combustion situation no longer relies on the combined running mode of coal pulverizer, the switching of burner coal dust spout and the switching of coal pulverizer do not need to carry out synchronously, needs according to the adjustment of furnace flame centre-height, switching the opening of burner coal dust spout by the coal angle valve, closing moment just can easily finish, and do not need to adjust the load of coal pulverizer or switch coal pulverizer, therefore operations staff's operational ton significantly reduces, and because therefore the delaying property that burning is adjusted and adjust the precision former thereby unstable factor of boiler combustion that cause such as low and avoided has improved the stability that boiler combustion is adjusted.
By the adjustment of burning of the coal angle valve on the layer coal pipe, process is safer, flexible, quick, simplify, efficient.Control steam temperature and prevent water screen tube outlet overtemperature as the coal dust spout that in the boiler startup process, can switch the burner different layers flexibly, in boiler operatiopn, can contain high steam temperature or low steam temperature etc. fast by closing the superiors or orlop burner coal dust spout.
The switching frequency of coal pulverizer also will significantly reduce, and coal pulverizer can keep the long period economical operation, reduce the wearing and tearing of plant consumption extra in the coal pulverizer handoff procedure and grinding component, help prolonging the service life of coal pulverizer; Conversely, the handover operation of coal pulverizer is also less to the influence of boiler combustion.
Under the boiler at low load situation, generally be that the ratio of air quantity and coal amount is higher, because the significantly reduction of coal powder density causes unstable combustion even fire extinguishing easily, one of key factor that as seen determines combustion intensity is a coal powder density.In the boiler de-activation procedure, prior art generally is stop using the successively from top to bottom feeder and the coal pulverizer of each layer burner coal dust spout correspondence, specifically be gradually coal-supplying amount to be reduced to zero, and blow off the coal pulverizer of stopping using again behind the accumulated powder in the coal pulverizer substantially, in this progressive process, cross when low when the coal powder density of combustion zone, unstable combustion will occur.Coal angle valve in the utility model can cooperate stopping using of coal pulverizer, flame unstability operating mode in the boiler load down process is shifted to an earlier date pre-control, promptly when inactive partial combustion device, keep the operation of adjacent layer burner as far as possible, make the coal dust that enters burner hearth concentrate on flame kernel fast with higher concentration, continue violent combustion chemistry reaction takes place, and do not need to drop into combustion-supporting oil or plasma; For the disconnected coal fault of common coal pulverizer, also can adopt this technology when improving combustion stability, to save combustion-supporting oil.As seen, the utility model technology can also improve the stability of the following burnings of accident conditions such as the disconnected coal of boiler at low load and coal pulverizer by the coal powder density of quick raising burner outlet and combustion zone, has not only saved combustion-supporting oil but also help reducing N0 xGrowing amount.
3) because the operation of coal pulverizer and the no longer direct correlation of operation of burner, and the burner reliability of operation is higher than rotary machine feeder and coal pulverizer far away, except artificial maloperation, exist certain layer of coal angle valve fault such as to close suddenly hardly, thereby the flame intensity between each layer can keep optimum state, can improve the stability of boiler combustion greatly; Lose coal flame between the different layers burner coal dust spout and will reduce greatly, so the startup success rate of coal pulverizer will improve, the emergency stop valve trip rate will reduce with the probability that loses incendiary source.
4) the coal pulverizer bypath system opens, stops operation except what coal pulverizer was finished in cooperation, can also aspirate in the stoppage in transit coal pulverizer and coal dust that powder delivery pipeline inner product is deposited, prevents spontaneous combustion of pulverized coal, blast; Therefore can cancel the steam inerting system of prior art double inlet and outlet coal mill and save steam, reduce entering of burner hearth moisture.
Can also recycle the coal dust that accumulates in the adjacent inactive boiler milling system, prevent its spontaneous combustion, explode or be blown into interior promptly the row to atmosphere of no flame burner hearth and cause raw coal to waste and environment black dust pollution without burning.
5) boiler opens, stops in the process, and the opening of coal pulverizer, to stop order unrestricted, can freely select according to the situation of coal pulverizer, feeder, run coal bin etc., and therefore also the ten minutes economy that helps coal conveyer belt is allocated.
6) because adjacent stove normally moves, and coal pulverizer powder delivery temperature is higher, the utility model can realize that adjacent stove starts for powder, helps lighting and burning of coal dust; When the lowest economic that reaches the separate unit coal pulverizer for the powder amount when adjacent stove is exerted oneself, switch to again by this stove coal pulverizer, so just can avoid the underload non-economy operating condition of this stove coal pulverizer for powder.
7) prior art boiler plasma ignition device generally is arranged in the orlop burner coal dust spout, if the coal pulverizer of this layer burner correspondence breaks down or is in inspecting state, the coal-burning boiler of then having cancelled combustion-supporting oil system can't start, and therefore boiler operatiopn ionic medium device also will lose standby functions; Which layer plasma ignition device of the present utility model no matter be arranged in, and is all no longer relevant with coal pulverizer, can realize that 100% is standby.
The utility model technology is after first floor coal dust is lighted, and other each layer burner coal dust spouts can be realized successively igniting, and do not need combustion-supporting oil.Therefore, under the condition that Plasma Firing Technology becomes better and approaching perfection day by day, the condition that the combustion-supporting oil system of coal-burning boiler fully phases out is ripe more.
4. description of drawings
Fig. 1 is the structural representation of the direct-firing boiler coal-ash induction system of the utility model malleation.
Among the figure: 1-coal pulverizer, 2-flour extraction pipe, 3-maintenance closure plate socket, 4-powder output valve, 5-coal pulverizer shunt valve, 6-bypass valve, the female pipe of 7-bypass, 8-bypass tube connector, the female pipe of 9-angle coal dust, the adjustable shrinkage cavity of 10-, 11-A layer coal pipe, 12-B layer coal pipe, 13-C layer coal pipe, 14-D layer coal pipe, 15-E layer coal pipe, 16-coal angle valve, 17-is to empty valve, 18-burner coal dust spout, 19-mixing distributor, 20-liaison tube, the 21-communicating door, 22-powder pumping pipe, 23-are taken out the powder valve.
5. the specific embodiment
As shown in Figure 1: the direct-firing boiler coal-ash induction system of a kind of malleation comprises coal pulverizer 1, flour extraction pipe 2, maintenance closure plate socket 3, powder output valve 4, coal pulverizer shunt valve 5, bypass valve 6, the female pipe 7 of bypass, bypass tube connector 8, the female pipe 9 of angle coal dust, adjustable shrinkage cavity 10, A~E layer coal pipe 11~15, coal angle valve 16, to empty valve 17, mixing distributor 19.Flour extraction pipe 2 comes together in mixing distributor 19 after coal pulverizer 1 is drawn, the female pipe of angle coal dust 9 is drawn from mixing distributor 19, be symmetrically arranged in the boiler both sides, design has adjustable shrinkage cavity 10 on the female pipe 9 of angle coal dust, be connected to A~E layer coal pipe 11~15 thereafter, female pipe 9 designs have coal angle valve 16 near the angle coal dust on A~E layer coal pipe 11~15, and A~E layer coal pipe 11~15 is connected with burner coal dust spout 18.
Referring to Fig. 1: flour extraction pipe 2 is merged by many flour extraction pipes of prior art and forms, powder output valve 4 on the flour extraction pipe 2, maintenance closure plate socket 3 are arranged near mixing distributor 19 as far as possible successively, be connected to before the maintenance closure plate socket 3 and the female pipe of the bypass 7 coal pulverizer shunt valves 5 that are connected, bypass valve 6 is positioned on the coal pulverizer shunt valve 5; Adjustable shrinkage cavity (not shown) also is equipped with in order to four jiaos of air quantity of leveling bypass after being connected to coal angle valve 16 on the A layer coal pipe 11 respectively in the female pipe of bypass 7 two ends on two short bypass tube connectors 8; Igniter is arranged in the coal dust spout 18 of B layer coal pipe 12 correspondences.
Behind the coal angle valve 16 on B, C, D, the E layer coal pipe 12,13,14,15 all design have empty valve 17, when arbitrary coal angle valve 16 is closed, open thereafter to empty valve 17 several minutes, utilize combustion chamber draft can pump the coal dust that accumulates behind the coal angle valve 16.
Mixing distributor 19 tops are connected to liaison tube 20, and liaison tube 20 is provided with communicating door 21 near mixing distributor 19 ends, be provided with behind the communicating door 21 to empty valve 17 with the female pipe of bypass 7 powder pumping pipes that are connected 22, powder pumping pipe 22 is provided with takes out powder valve 23; The other end of liaison tube 20 is connected with the mixing distributor of adjacent stove 19 tops, corresponding communicating door 21 is also arranged, to empty valve 17, powder pumping pipe 22 with take out powder valve 23 in adjacent furnace side.
Further, in order to prevent that the superiors from being that the end that coal angle valve 16 on the E layer coal pipe 15 is closed the female pipe 9 of relief angle coal dust stops up, the end of the female pipe 9 of angle coal dust has been strengthened caliber, and B, D, E layer coal pipe (12,14,15) are drawn from female 9 the end of managing of angle coal dust all; Also designing on the latter end of the female pipe 9 of angle coal dust has empty valve 17.
Coal pulverizer flour extraction pipe 2, mixing distributor 19, the female pipe 9 of angle coal dust are equipped with abrasionproof liner (not shown).
[operation implementation]
Adjacent stove starts for powder: open the communicating door 21 of this stove, open the communicating door 21 of adjacent stove, adjacent stove coal dust enters this stove mixing distributor 19, by the coal angle valve 16 on the B layer coal pipe 12 to the burner hearth powder feeding; Too fast in order to prevent that steam temperature from rising, behind flameholding, the coal angle valve 16 that can open on the A layer coal pipe 11 ignites to the burner hearth powder feeding, and flame kernel is moved down.After adjacent stove finishes for powder, should open this stove take out powder valve 23 and adjacent stove take out before the powder valve 23 to empty valve 17, pump the coal dust that accumulates in the liaison tube 20, in case dust spontaneous combustion or blast.
The startup of first coal pulverizer: if when not taking adjacent stove to start for powder, open the outlet valve 4 of coal pulverizer 1, start coal pulverizer 1, coal dust directly enters mixing distributor 19, and the coal angle valve of opening on the B layer coal pipe 16 is lighted a fire to the burner hearth powder feeding; If when taking adjacent stove to start for powder, the startup of first coal pulverizer can first by-passing, and the burner coal dust spout 18 by A layer coal pipe 11 correspondences is to the burner hearth powder feeding.
The startup of other coal pulverizers is arranged side by side: wait that the powder output valve 4 that opens coal pulverizer 1 is closed, bypass valve 6 is opened, start coal pulverizer 1; The powder outlet quantity at the female pipe of bypass 7 two ends can be adjusted by the adjustable shrinkage cavity on the bypass tube connector 8 as far as possible and equate.When the pressure in the outlet pressure 〉=mixing distributor 19 of this coal pulverizer 1, open the outlet valve 4 of coal pulverizer 1, establish coal angle valve 16 newly, close the bypass valve 6 of coal pulverizer 1; The coal pulverizer of paired running keeps load to equate as far as possible.
Stopping using of coal pulverizer: wait that the load that stops coal pulverizer is reduced to permissible value, after its bypass valve 6 is opened, close its powder output valve 4, coal pulverizer continues load down, timely according to circumstances closed portion coal angle valve 16, the coal pulverizer of stopping using when the coal pulverizer load is reduced to Minimum Acceptable Value; It is too high to prevent the coal pulverizer internal temperature that coal pulverizer after stopping using continues the suitable cooling air quantity of maintenance, blows off the coal dust that accumulates in the coal pulverizer simultaneously.
Reclaim adjacent stove coal dust: this stove communicating door 21 is closed, and adjacent stove communicating door 21 is opened, and all coal angle valves 16 of adjacent stove are closed, empty valve 17 is opened on the female pipe 9 of adjacent chimney corner coal dust, and this stove is taken out powder valve 23 and is opened; In case of necessity, close the coal angle valve 16 on this stove A layer coal pipe 11, can comparatively fast pump adjacent stove coal dust.

Claims (4)

1. direct-firing boiler coal-ash induction system of malleation, comprise the female pipe of coal pulverizer, flour extraction pipe, maintenance closure plate socket, powder output valve, coal pulverizer shunt valve, bypass valve, bypass, bypass tube connector, the female pipe of angle coal dust, adjustable shrinkage cavity, layer coal pipe, coal angle valve, to empty valve, mixing distributor, the flour extraction pipe (2) that it is characterized in that every medium-speed pulverizer has only one, the flour extraction pipe of double inlet and outlet coal mill (2) then is two, and the flour extraction pipe of each coal pulverizer (2) comes together in mixing distributor (19); The female pipe of angle coal dust (9) is drawn from mixing distributor (19), is symmetrically arranged in the boiler both sides; The female pipe of angle coal dust (9) is gone up design adjustable shrinkage cavity (10), be connected to A~E layer coal pipe (11~15) after the adjustable shrinkage cavity (10), A~E layer coal pipe (11~15) gone up near the female pipe of angle coal dust (9) design coal angle valve (16), and B~E layer coal pipe (12~15) gone up each coal angle valve (16) back design to be had empty valve (17).
2. the direct-firing boiler coal-ash induction system of a kind of malleation as claimed in claim 1 is characterized in that: the preceding coal pulverizer shunt valve (5) that is connected with the female pipe of bypass (7) that is connected to of maintenance closure plate socket (3), and coal pulverizer shunt valve (5) is provided with bypass valve (6); The female pipe of bypass (7) two ends are connected in coal angle valve (16) back with two A layer coal pipes (11) respectively, on short therein two bypass tube connectors (8) adjustable shrinkage cavity are housed.
3. the direct-firing boiler coal-ash induction system of a kind of malleation as claimed in claim 1, it is characterized in that: mixing distributor (19) top is connected to the liaison tube (20) with adjacent stove, liaison tube (20) is provided with communicating door (21) near mixing distributor (19) end, be provided with behind the communicating door (21) empty valve (17) and the powder pumping pipe (22) that is connected with the female pipe of bypass (7), powder pumping pipe (22) is provided with takes out powder valve (23).
4. the direct-firing boiler coal-ash induction system of a kind of malleation as claimed in claim 1 is characterized in that: the end of the female pipe of angle coal dust (9) has strengthened caliber, has drawn a plurality of layers of coal pipe from the female pipe of angle coal dust (9) end; The latter end of the female pipe of angle coal dust (9) has also designed empty valve (17).
CN2010201759420U 2010-04-10 2010-04-10 Boiler pulverized coal conveyer system Expired - Fee Related CN201688428U (en)

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Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103162305A (en) * 2011-12-14 2013-06-19 河南省电力勘测设计院 Combined type coal pulverizing system
CN104279575A (en) * 2014-09-28 2015-01-14 吉林省电力科学研究院有限公司 Novel medium-speed coal mill exhaust extraction system
CN105444197A (en) * 2014-08-27 2016-03-30 沈阳工程学院 Two-level one-inlet and five-outlet uniform distributing device system
CN109668144A (en) * 2018-11-21 2019-04-23 大唐东北电力试验研究院有限公司 A kind of combustion system optimized and revised for the wide load steam temperature of circle of contact pulverized-coal fired boiler

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103162305A (en) * 2011-12-14 2013-06-19 河南省电力勘测设计院 Combined type coal pulverizing system
CN105444197A (en) * 2014-08-27 2016-03-30 沈阳工程学院 Two-level one-inlet and five-outlet uniform distributing device system
CN105444197B (en) * 2014-08-27 2017-11-17 沈阳工程学院 A kind of second order one enters five and goes out divider system
CN104279575A (en) * 2014-09-28 2015-01-14 吉林省电力科学研究院有限公司 Novel medium-speed coal mill exhaust extraction system
CN104279575B (en) * 2014-09-28 2017-01-11 吉林省电力科学研究院有限公司 Medium-speed coal mill exhaust extraction system
CN109668144A (en) * 2018-11-21 2019-04-23 大唐东北电力试验研究院有限公司 A kind of combustion system optimized and revised for the wide load steam temperature of circle of contact pulverized-coal fired boiler
CN109668144B (en) * 2018-11-21 2020-09-18 大唐东北电力试验研究院有限公司 Combustion system for optimizing and adjusting wide-load steam temperature of tangential pulverized coal fired boiler

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